#include<graphics.h>
#include<conio.h>
int main()
{
	int step = 30;
	initgraph(600, 600);
	setbkcolor(BROWN);
	cleardevice();
	setlinestyle(PS_SOLID, 2);
	setcolor(RGB(0, 0, 0));
	int i;
	for (i = 1; i <= 19; i++)
	{
		line(i * step, 1 * step, i * step, 19 * step);
		line(1 * step, i * step, 19 * step, i * step);
	}
	_getch();
	closegraph();
	return 0;
}